1 files changed, 72 insertions, 0 deletions
diff --git a/gfx/layers/composite/CanvasLayerComposite.h b/gfx/layers/composite/CanvasLayerComposite.h
new file mode 100644
index 0000000000..dbe29fbb6d
--- /dev/null
+++ b/gfx/layers/composite/CanvasLayerComposite.h
@@ -0,0 +1,72 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef GFX_CanvasLayerComposite_H
+#define GFX_CanvasLayerComposite_H
+
+#include "Layers.h"                                // for CanvasLayer, etc
+#include "mozilla/Attributes.h"                    // for override
+#include "mozilla/RefPtr.h"                        // for RefPtr
+#include "mozilla/layers/LayerManagerComposite.h"  // for LayerComposite, etc
+#include "mozilla/layers/LayersTypes.h"            // for LayerRenderState, etc
+#include "nsRect.h"                                // for mozilla::gfx::IntRect
+#include "nscore.h"                                // for nsACString
+
+namespace mozilla {
+namespace layers {
+
+class CompositableHost;
+// Canvas layers use ImageHosts (but CanvasClients) because compositing a
+// canvas is identical to compositing an image.
+class ImageHost;
+
+class CanvasLayerComposite : public CanvasLayer, public LayerComposite {
+ public:
+  explicit CanvasLayerComposite(LayerManagerComposite* aManager);
+
+ protected:
+  virtual ~CanvasLayerComposite();
+
+ public:
+  bool SetCompositableHost(CompositableHost* aHost) override;
+
+  void Disconnect() override { Destroy(); }
+
+  void SetLayerManager(HostLayerManager* aManager) override;
+
+  Layer* GetLayer() override;
+  void RenderLayer(const gfx::IntRect& aClipRect,
+                   const Maybe<gfx::Polygon>& aGeometry) override;
+
+  void CleanupResources() override;
+
+  void GenEffectChain(EffectChain& aEffect) override;
+
+  CompositableHost* GetCompositableHost() override;
+
+  HostLayer* AsHostLayer() override { return this; }
+
+  const char* Name() const override { return "CanvasLayerComposite"; }
+
+ protected:
+  RefPtr<CanvasRenderer> CreateCanvasRendererInternal() override {
+    MOZ_CRASH("Incompatible surface type");
+    return nullptr;
+  }
+
+  void PrintInfo(std::stringstream& aStream, const char* aPrefix) override;
+
+ private:
+  gfx::SamplingFilter GetSamplingFilter();
+
+ private:
+  RefPtr<CompositableHost> mCompositableHost;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif /* GFX_CanvasLayerComposite_H */